Ronnie Citron-Fink

"Like 75% of American women, Ronnie Citron-Fink dyed her hair, visiting the salon every few weeks to hide gray roots in her signature dark brown mane. She wanted to look attractive, professional, young. Yet as a journalist covering health and the environment, she knew something wasn't right. All those unpronounceable chemical names on the back of the hair dye box were far from natural. Were her recurring headaches and allergies telltale signs that...